[G14_run] Locations of the Kel-F windows

Tsuneo Kageya kageya at jlab.org
Fri May 5 09:48:58 EDT 2023


Ciao Alessandra,


 here is an expanded view of Fig. 28 (attached to this email).

 I would like to suggest to show z range -15 < z < -5 cm for Fig. 28.

 I don't think we need the range of z > -5 cm.

 We can see the following things from the figure.



 (1) Relative positions of three Kel-F windows for Gold2 (19b) and Empty (21a).

 I am attaching the info. about target cell 19b and 21a.


 (a) The positions of downstream Kel-F windows for Gold2 and Empty are close at Fig. 28.


 (b) As can see L1 on the table of the attacment, the difference of 96.21 - 95.74 = 0.47 mm

is seen at the exit windows at Fig. 28.


 (c) L4 difference shown on the table as 36.90 - 34.10 = 2.8 mm can be seen at the entrande windows at Fig.28.


 (2) Small diffence of downstream Kel-F positions between Silver (21a) and Empty (21a) can be observed as 1 mm or so

which could be negligible.


 In order to understand eq. 35, can you define, l_empty, l_gold, Z ^gold_KelF1 and Z^empty_KelF1 ?

What are their equivalent numbers at the table ?


 Ciao, Tsuneo Kageya.


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